München 2006 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 16: Elektromagnetische und Hadronische Sonden
HK 16.2: Vortrag
Dienstag, 21. März 2006, 14:15–14:30, G
Investigation of the 3He η Final State in dp-Reactions at ANKE — •Timo Mersmann, Alfons Khoukaz, Malte Mielke, Michael Papenbrock, and Tobias Rausmann — Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster
The existence of η-mesic nuclei is still an open issue of research. To investigate the possibility of the formation of such bound systems, production measurements with one η meson and one light nucleus in the final state are of great interest. By studying the final state interaction at low excess energies, information about the final state interaction and therefore about the scattering length of the η-nucleus system can be gained. The latter one is closely related to the properties of such a possible bound state and has to be determined with high precision. The available data sets in the close vicinity of the threshold expose discrepancies, which currently forbid the extraction of scattering length information with sufficient precision. Therefore, the reaction d+p→3He+η has been investigated at the ANKE spectrometer using a continuously ramped accelerator beam at excess energies ranging from below threshold up to Q=+12 MeV. Due to the full geometrical acceptance of the ANKE spectrometer high statistic data on this reaction have been obtained. Additionally, data at excess energies of Q = 20, 40 and 60 MeV have been recorded in order to determine total cross sections and to investigate contributions from higher partial waves. First preliminary results of the analysis will be presented and discussed.
*Supported by FZ-Jülich (COSY-FFE)